You must be out of this world if you don't know what a mobile device is. And you don't even have to be a computer geek to have previously tried one of these babies, since they are so widely spread by now.
But just to be safe, Microsoft thought it was better to publish some additional information about these tiny computers, so they came up with this new technical document: Mobile Devices Overview. It's a 2 page PowerPoint document where you'll learn what mobile devices can do, how they compare to desktop and laptop computers, and how you can use them in your daily work.
Of course that one of the main benefit it's the access to e-mail:
E-Mail Access: You are traveling between work sites and need information. With your mobile device, you can use e-mail while waiting to board a plane, while riding a shuttle, or while getting food at a cafeteria.